Lock-nut



J. VAROGA.

LOCK NUT.

APPLICATION FILED NOV. 20. 1919.

Patented May 25, 1920.

UNITED JOHN VARCIGA, OF PITTSBURGH, PENNSYLVANIA.

LOCK-NUT.

Specification of Letters Patent.

Patented May 25, 19239..

Application filed November 20, 1919. Serial No. 339,357.

To all wiwmt't may concern:

Be it known that 1, JOHN Vnnoen, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Lock-Nuts, of which the following is a specification.

This invention relates to improvements in lock nuts, and the objects thereof are to provide a device of the character described, in a manner as hereinafter set forth, which may be readily applied to nuts and bolts employed for various purposes, and which may be readily released when it is to be removed but will be firmly held from such releasing movement when the device is applied.

Further objects of this invention are to provide a device of the type specified which is simple in its construction and arrangement, strong, durable and eficient in its use, and inexpensive to manufacture.

To the accomplishment of these and such other objects as may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts herein specifically described and illustrated in the accompanying drawing, wherein is shown an embodiment of the invention, but it is to be understood that changes, variation and modifications may be resorted to which come within the scope of the claims hereunto appended.

In the drawing forming a portion of this specification and wherein like numerals of reference designate corresponding parts throughout the several views:

Figure 1 is a side elevation of a bolt with the improvement applied, the nut and structure through which the bolt operates being in section.

Fig. 2 is a bottom plan view of the nut.

Fig. 3 framentary side elevation of a bolt showing the attachment of a modified form of locking element.

r Fig. 4 is a sectional view on line TV-TV,

Fig. 5 is a side elevation of a lock washer applied to a nut of the ordinary construction.

Fig. 6 is a top plan view of the lock washer.

Referring to the drawing in detail the nut 1, employed in my improved device is of the usual form, and is provided in its lower face with a recess 2 which encompasses the threaded aperture 3 in the nut 1. The inner face of the recess 2 is formed with a plurality of ratchet-shaped abutments 1, and is curvilinear in contour from the inner point 5 from each of the abutments 4 to the outer point 6 of the successive abutment.

Formed on the lower face of the nut 1 and extending parallel with each of the abutments .4, is a groove 7, which opens outwardly and communicates with the recess 2, and which is adapted for the reception of an implement for releasing the locking element from the abutment in a manner hereinafter described.

The locking member 8, used in connection with the nut 1, comprises a substantially U- shaped fiat spring having a long arm 9 and a short-arm 10, and which is adapted to seat in a pocket 11 formed in the structure 12 in which the bolt 13 is used. The short arm 10 of the locking member 8 is positioned against the side of the bolt 13, while the long arm 9 extends above the top face of the structure 12 and into the recess 2 of the nut 1. When the nut 1 is screwed upon the bolt 13 the long arm 9 of the locking member 8 will pass along the curvilinear inner face of the recess 2 and the abutments 1 formed thereon, but when the nut 1 is turned in the reverse direction to release the same, the long arm 9 of the locking member 8 will engage the abutment 4: and positively prevent such return movement.

For releasing the nut 1 from the bolt 13, a suitable implement is inserted into the groove 7 and the long arm 90f the locking member 8 forced inwardly thereby to disen: gage the abutment 4. By repeatedly releasing the long arm 9 from the successive abutments as above described until the recess 2 of the nut has cleared the top end of the arm 9 the nut may readily be removed.

The locking member 141, as shown in Figs. 3 and d of the drawing, dififers from the locking member 8 in that it is attached in the slot 15 to the bolt instead of being positioned in a pocket in the structure against the bolt. The loclring member 14: comprises a fiat spring having its free end 16 normally adapted to engage the abutment & of the nut 1. The locking member 1 1 is attached to the bolt at a point slightly above the face of the structure in which it is used, and is released to remove the nut in a manner identical to that described in the preferred form.

The device shown in Figs. 5 and 6 comprises a nut 17 and a lock washer 18, the

former provided with oppositely disposed apertures 19 and 20 on its under face which are adapted to register and receive the pins 21 and 22 mounted on the upper face of the washer 18.

The construction of the washer 18 is identical to the construction of the lower portion of the nut 1 which is an integral nut While the nut 17 with the washer 18 forms a twoing member of resilient metal seated in said pocket and formed with a long arm and a short arm, said'long arm protruding from said pocket in said structure, and a nut havsaid nut being further provided with grooves to permit the removal of said nut from said 25 bolt.

2. In a lock nut a member having one face thereof recessed and further provided with a plurality of ratchet-shaped abutments, said face'further formed with transverse grooves JOHN VAROGA. 

